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Photo by: Mike Bizelli

** FILE ** This undated image provided by the ASPCA shows animal behaviorists testing a dog for food aggression by using a fake hand to assess the dog's response in Joplin, Mo. Many pets who end up in rehab are victims of abusive owners who have been arrested for dogfighting, hoarding or puppy mill violations. (AP Photo/ASPCA, Mike Bizelli)

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